Teach the triple library about the androideabi environment.

Patch by Evgeniy Stepanov.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147871 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Triple.cpp b/lib/Support/Triple.cpp
index 8f58e70..732fca5 100644
--- a/lib/Support/Triple.cpp
+++ b/lib/Support/Triple.cpp
@@ -125,6 +125,7 @@
   case GNUEABI: return "gnueabi";
   case EABI: return "eabi";
   case MachO: return "macho";
+  case ANDROIDEABI: return "androideabi";
   }
 
   return "<invalid>";
@@ -387,6 +388,8 @@
     return GNU;
   else if (EnvironmentName.startswith("macho"))
     return MachO;
+  else if (EnvironmentName.startswith("androideabi"))
+    return ANDROIDEABI;
   else
     return UnknownEnvironment;
 }